The Kolkata Police have opened an unnatural death investigation into the death of famed singer Krishnakumar Kunnath, also known as KK. The case was reported to the New Market police station. Injury marks were discovered on the singer's face and head, according to police sources. Despite the fact that the singer collapsed at the hotel after delivering a live concert at Kolkata's Nazrul Mancha theatre, police suspect his death was unnatural. According to the Police, the true cause of death can only be determined after the autopsy. According to reports, investigators would also question Kolkata hotel personnel and organisers.